# Copyright (c) Microsoft Corporation
# All rights reserved.
#
# MIT License
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
# documentation files (the "Software"), to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
# to permit persons to whom the Software is furnished to do so, subject to the following conditions:
# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
# BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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import multiprocessing


class LoggerMixin(object):
    """
    This mixin is to add a logger property conveniently to classes derived from it.
    The usage is like:

        class A(LoggerMixin):
            def do_something():
                self.logger().info("log message")
    """

    @property
    def logger(self):
        try:
            if self._logger is None:
                self._logger = self._get_logger()
        except AttributeError:
            self._logger = self._get_logger()
        return self._logger

    def _get_logger(self):
        return multiprocessing.get_logger().getChild(".".join([self.__class__.__module__, self.__class__.__name__]))
